Examples of DCS Interaction with an FSI

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Examples of DCS Interaction with an FSI

• Bob Krzaczek

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FSI Chain Example AIRES
Extract EXP planfor current flight leg

• Some instruments are very easy to adapt, as they
  run in a scripted batch mode.
• Note potential for reuse 2/3 of this simple
  chain is applicable to other instruments.

Convert this legs EXPinto target schedule
Build AIRES EXPscript
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FSI Chains
Data Acquisition Task

• Chains are created by linking small
  function-specific modules together.
• Modules are small, and therefore easily used by
  or ported to similar instruments or modes.

ReduceEXP plan
...
...
...
Instrument or Simulator
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DCS Pipeline Example AIRES
Faucet

• AIRES already has a pipeline of their own
  development with 12 separate reductions.
• We can encapsulate their pipeline as a single DCS
  algorithm to get running in the short term.

DCSStorage
ExistingPipeline
Sink
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DCS Pipeline Example AIRES
Faucet

• Later, as time and resources permit, we can port
  the existing AIRES pipeline over to the DCS
  structure.
• This will not impact existing reductions.
• Benefits include speed and fault tolerance.

Bad Pixel Mask
Cosmic Ray Mask
DCSStorage
Combine Raw Data
Gain Correction
...
Sink
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DCS Pipelines
Faucet

• Pipelines are created by connecting algorithm
  elements together at runtime.
• Modules are small, and therefore easily used by
  or ported to similar pipelines.

algo
DCSStorage
algo
algo
algo
Sink
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FSI Chain Example ABU
Extract EXP planfor current flight leg

• Consider SPIREX/ABU as if it were a DCS
  instrument.
• Other instruments may need to be commanded on
  the fly.
• The FSI Chain is lengthened with more modules
  that simply do further refinement.

Convert this legs EXP into target schedule
Emit target modeaccording to GPS
Send commands(stare, nod, move)
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Additional DCS Design Requirements

• Each instrument mode will have one or more
  pipelines associated with it.
• The DCS must support new pipelines throughout
  SOFIA lifetime.
• Previous pipelines should remain available for
  reducing old data or validating new algorithms.

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DCS Design Goals

• The addition of a new pipeline to the SOFIA
  program should not impact the existing DCS
  system.
• All infrastructure and support for interfacing
  with the DCS will be provided to the pipeline
  designer.
• Enable the reuse of software components between
  similar pipelines.

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DCS Pipelines

• Each planned observation includes a pipeline and
  its required parameters.
• The DCS provides the communication and
  distribution mechanisms pipeline designers need
  only focus on algorithm development.
• Current design allows for easy porting of
  existing pre-DCS pipelines to DCS structure.

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Example Pipeline Description

• lt?xmlltpipelinegtltnamegtaires_001lt/namegtltdatagt
  ltnamegtrawAiresDatalt/namegt lttypegtrawAiresFrameslt/t
  ypegtlt/datagtltdatagt ltnamegtreducedAiresDatalt/namegt
  lttypegtairesImageslt/typegtlt/datagtltelement
  typefaucetgt ltoutput namerawAiresData/gtlt/el
  ementgtltelement typeairesAllInOnegt ltinput
  namerawAiresData/gt ltoutput namereducedAiresD
  ata/gtlt/elementgtltelement typesinkgt ltinput
  namereducedAiresData/gtlt/elementgtlt/pipelinegt